Apparatus for code conversion of binary to multilevel signal

Details Apparatus for code conversion of binary to multilevel signal Apparatus for code conversion of binary to multilevel signal

H - Electricity

03

M

354/106

H03M 5/20 (2006.01)

Patent

CA 1210155

APPARATUS FOR CODE CONVERSION OF BINARY TO MULTILEVEL SIGNALS Abstract of the Disclosure Apparatus for converting binary to quaternary-level signals in which the symbols of selected words are inverted in order to eliminate the d-c component of the signal. In order to reduce the power spectral density at frequencies close to d-c and increase the power spectral density at frequencies close to the Nyquist rate, one word of each frame is selectively inverted relative to another in order to maximize the summation of all the numerical values of the differences between adjacent symbol levels. Thereafter both words of the frame are selectively inverted in order to minimize the running digital sum of the signal. - i -

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